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Finding the Fourth Proportional to 884.89, 1,315.41 and 858.67

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Solution

The fourth proportional to 884.89, 1,315.41 and 858.67 is: 1,276.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    884.89 : 1,315.41 = 858.67 : x
  2. Step 2: Convert to fraction form
    884.89/1,315.41 = 858.67/x
  3. Step 3: Cross multiply
    884.89x = 1,315.41 × 858.67
  4. Step 4: Simplify right side
    884.89x = 1,129,496.60
  5. Step 5: Solve for x
    x = 1,129,496.60/884.89
  6. Step 6: Final answer
    x = 1,276.42

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.